EP2045514B1 - Système d'éclairage optique réflectif modulaire et dispositif d'éclairage équipé de celui-ci, en particulier pour véhicules - Google Patents

Système d'éclairage optique réflectif modulaire et dispositif d'éclairage équipé de celui-ci, en particulier pour véhicules Download PDF

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Publication number
EP2045514B1
EP2045514B1 EP07425625.6A EP07425625A EP2045514B1 EP 2045514 B1 EP2045514 B1 EP 2045514B1 EP 07425625 A EP07425625 A EP 07425625A EP 2045514 B1 EP2045514 B1 EP 2045514B1
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EP
European Patent Office
Prior art keywords
optical system
light source
optical axis
angle
light
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Application number
EP07425625.6A
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German (de)
English (en)
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EP2045514B2 (fr
EP2045514A1 (fr
Inventor
Alberto Pairetti
Salvatore Pierro
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marelli Automotive Lighting Italy SpA
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Automotive Lighting Italia SpA
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Application filed by Automotive Lighting Italia SpA filed Critical Automotive Lighting Italia SpA
Priority to EP07425625.6A priority Critical patent/EP2045514B2/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24—Light guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • F21S41/336—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with discontinuity at the junction between adjacent areas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/251—Light guides the light guides being used to transmit light from remote light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F21S43/31—Optical layout thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F21S41/153—Light emitting diodes [LED] arranged in one or more lines arranged in a matrix
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a modular reflective optical lighting system, and a lighting device equipped therewith, in particular a vehicle light or headlight, wherein the desired brightness distribution is achieved, among other things, by juxtaposing inside a single body two or more modular optical systems comprising the same "basic" components, the latter being more or less identical to one another.
  • DRL Daytime Running Light function
  • progressive illumination of bends cornering
  • WO2007069123 for example relates to a vehicle dipped-beam headlight that is provided with a solid-state light source (LED).
  • LED solid-state light source
  • the term "light source” refers to any light source (LED, incandescent lamp, discharge lamp, etc.) in which the light rays that are emitted can be approximated as ideally radiating from a single point, for example, in case of incandescent lamps, from the middle of the filament.
  • This definition therefore excludes light sources such as neon tubes, in which the light rays are radiated from a plurality of adjacent points arranged along an axis.
  • the headlight described in WO2007069123 while using a LED as the light source, is relatively large and complex, due to the need to overcome a series of practical design problems associated with the use of a single solid-state light source that is sufficiently powerful to achieve the brightness distribution required by a headlight.
  • DE19820267 describes a reflective optical lighting system that uses a LED light source and achieves uniform distribution of the emitted light in a system with limited overall dimensions; said optical system is based on the connection of the light source with a reflector consisting of a convex element the convexity of which lies in the main direction of emission of the light source; the convex element can consist of a curved surface or of two reflecting surfaces of any shape (flat, concave or convex) joined together at an angle.
  • This type of optical system conceived for the rear illumination of a display, for example a liquid crystal display, can in theory also be used for vehicle lighting devices, but in that case its use would clearly be limited to lamps only.
  • the purpose of the present invention is therefore to provide a reflective optical lighting system with reduced overall dimensions that is suitable to use light sources consisting of LEDs, as in the case of the optical system described in DE19820267 , but which is more versatile and in particular can be used indifferently to produce lamps and headlights and can therefore be used in the manufacture of indicator and lighting devices for vehicles that are cheap to produce, light in weight, have reduced overall dimensions and low electricity consumption, possibly with a single device incorporating a multitude of different optical functions, thus overcoming the limits of the prior art.
  • DE102004025699 does not solve this problem.
  • a reflective optical system is provided as set forth in claim 1.
  • the reflective optical lighting system comprises at least one light source having a first optical axis defining a main direction of radiation of light rays emitted by said source and at least a first and a second reflecting surface operationally associated with the light source to intercept the light rays and arranged so as to form between them a first pre-defined angle of a size other than 180°; unlike in DE19820267 , however, the first and second reflecting surfaces delimit, between them, a concavity oriented towards the light source and are shaped so that, when in use, said concavity receives a substantial portion of said light rays emitted by the source to reflect them in a direction forming with the first optical axis a second angle of a pre-defined size, so that the reflected rays present a main direction of radiation defined by a second optical axis essentially perpendicular to the first.
  • the light source that is used is preferably a Lambertian light source and in that case the concavity defined between the first and the second reflecting surfaces and oriented towards the light source occupies a solid angle greater than n steradians, i.e. greater than a quarter of the solid spherical angle, and in any case such that at least 30% of the light rays emitted by the source are intercepted by the first and second reflecting surfaces.
  • the optical system according to the invention can also comprise at least one bright, clear or coloured secondary optical element, operationally associated with the first and second reflecting surfaces in the direction defined by the second optical axis and consisting of at least a lens or a matrix of micro-optics arranged transversely to the second optical axis.
  • the optical system according to the invention can comprise a plurality of light sources, each operationally associated with a first and second reflecting surface to form therewith a single lighting module so that said system consists of a plurality of lighting modules mutually juxtaposed in a one-dimensional or two-dimensional matrix arrangement.
  • the invention also relates to a lighting device comprising a cup-shaped element, preferably made of plastic or metal and fixable to the body of a vehicle, and at least a transparent fluid-tight sealing element to close an opening in the cup-shaped element in which said optical system is arranged and housed in a position oriented towards the opening and such that the second optical axis intercepts the transparent closing element and when used is directly parallel to a direction in which the vehicle is travelling.
  • both headlights in particular those intrinsically incorporating a bright-dark or cut-off line such as main-beam headlights or fog lights, in which the light source, in particular a LED light source, is assembled face-down - hereinafter referred to as DLA, for "Down LED Assembly” - so that the parasite rays illuminate the road and are not dispersed upwards), and indicator lights (position or direction indicators, etc.)
  • DLA Down LED Assembly
  • lighting devices that consist of a single “basic” optical module, comprising a light source and the two reflecting surfaces associated therewith joined at an angle of approximately 90° depending on the desired brightness distribution (symmetric or asymmetric).
  • a “basic” module can be connected vertically or horizontally to one or more identical or similar modules, in order to obtain a complex system, which allows the use of particular types of activation logic, for example to activate the different modules gradually as a function of the steering angle of the vehicle (the "Static Bend Lighting” function).
  • the light sources can be incandescent lamps or solid-state sources (LEDs).
  • the LEDs can be SMDs (Surface Mounted Devices) or dies (semiconductors only), possibly in a matrix arrangement. If several chips are used in the same basic module for example, different coloured lights can be obtained, using the same pair of angled reflecting surfaces for different functions, by appropriately mixing the contributions deriving from different monochromatic LED sources. For example, using RGB (Red Green Blue) LEDs, the same function can be used for the direction indicator, DRL and particular sectors of the dipped-beam / main-beam functions.
  • RGB Red Green Blue
  • Possible fields of application for the present invention are therefore headlights or lamps for cars, both to implement indicator functions (direction indicators, DRL, position indicators, side markers) and lighting functions (dipped-beam, main-beam, fog lights, SBL).
  • reference number 1 indicates a reflective optical lighting system comprising at least one light source 2 and at least a first reflecting surface 3 and a second reflecting surface 4 operationally associated with the light source 2 and arranged obliquely in relation to one another; in particular, the light source 2 has a first optical axis A defining a main direction of radiation of light rays R emitted by said source 2 and the reflecting surfaces 3 and 4, which may be flat, concave or convex and can be defined by a single equation or by a complex series of equations, are oriented with respect to the axis A to intercept the light rays R and are in particular arranged to form between them a preset first angle ⁇ of a size other than 180°.
  • the reflecting surfaces 3 and 4 between them delimit a concavity 5 oriented towards the light source 2 and are shaped so that when in use said concavity 5 receives a substantial portion of the light rays R emitted by the source 2 to reflect them in a direction forming with the optical axis A an angle ⁇ ( figure 5 ) of a preset size, so that the reflected rays r present a main direction of radiation defined by a second optical axis B, essentially perpendicular to the optical axis A.
  • the angle ⁇ between the two reflecting surfaces 3,4 arranged obliquely in relation to one another is 90° or in the region of 90°, for example ( figures 3a and 3b ) said angle is respectively less than 90° ( figure 3b ) or more than 90° ( figure 3a ), thus achieving a respectively asymmetric and symmetric brightness distribution of the reflected rays r with respect to the optical axis B.
  • the size of the angle ⁇ can be between 50° and 150° and, more preferably, it is between the values ⁇ 1 of 85° and ⁇ 2 of 100°.
  • the reflective optical system 1 described herein preferably comprises, for each first and second reflecting surface 3 and 4, associated with a single light source 2, at least a third reflecting surface 10 ( figure 5 ) and/or 11 ( figure 1a ) oriented towards the concavity 5 and in any case arranged essentially perpendicularly to the optical axis A, in order to also produce in the direction defined by the optical axis B reflected rays r' ( figure 5 ) which have undergone a double reflection, for example so as to send almost all of the light rays R emitted by the source 2 below a bright-dark cut-off mark L ( figure 3 ).
  • the light source 2 is preferably, but not necessarily, a Lambertian light source and the concavity 5 defined between the reflecting surfaces 3 and 4 and oriented towards the light source 2 occupies a solid angle greater than n steradians, i.e. greater than a quarter of the solid spherical angle, and in any case such that at least 30% of the light rays R emitted by the source 2 are intercepted by the reflecting surfaces 3,4 and re-directed as rays r (or r' ).
  • the optical system 1 described herein can also comprise ( figure 1a ) at least one bright, clear or coloured secondary optical element 20, operationally associated with the reflecting surfaces 3,4 in the direction defined by the second optical axis B and consisting of at least a lens or a matrix of micro-optics 21 arranged transversely to the axis B.
  • a reflective optical system 100 can be achieved by combining several "elementary" optical systems 1, which can be identical or not to one another.
  • figure 1b shows a reflective optical system 100 of the "complex" type comprising a plurality of light sources 2a,2b,2c, each operationally associated with a first reflecting surface, respectively 3a,3b,3c and with a second reflecting surface 4a,4b,4c, to form therewith a single lighting "module" 1a,1b,1c, so that the optical system 100 is made up of a plurality of lighting modules 1a,1b,1c, mutually juxtaposed in a mono-dimensional matrix arrangement (i.e.
  • the reflecting surfaces 3a,b,c, and 4a,b,c can be identical or, generally, not identical but with different equations and shapes, depending on the desired brightness distribution, and, likewise, the angles ⁇ 1 and ⁇ 2 can be identical or different.
  • the sources 2 that are used comprise photoemitting means 30 selected from the group comprising: incandescent lamps; gas discharge lamps; monochromatic LEDs; polychromatic LEDs; and preferably consist of LEDs 30 suitable to emit a luminous flux of at least 10 lumens for a white light LED and 3 lumens for a red or orange light LED, mounted on at least one printed circuit board 31.
  • a further alternative embodiment of the invention instead of consisting of one or more "basic” modules 1 possibly connected in a matrix arrangement, as illustrated in figure 1b , it can consist of one or more "basic” modules 200 ( figure 2 ), in which the reflecting surfaces 3 and 4 which are arranged obliquely in relation to one another at an angle (3 such as to subtend a concavity 5 delimited between said surfaces 3 and 4, are associated with a light source 202 comprising photoemitting means such as a LED 30 borne by a relative printed circuit board 31 and a light guide 203 (for example consisting of a fiber optic or a fiber optic bundle), of which a first end 204 is arranged on a axis with the optical axis A and of which a second end 205 is arranged remotely in relation to the first and is connected to the photoemitting means 30.
  • a light source 202 comprising photoemitting means such as a LED 30 borne by a relative printed circuit board 31 and a light guide 203 (for example
  • the "basic modules" or systems 200 can of course also be connected to one another (or to basic modules 1) to form complex systems of the type of system 100 in figure 1b .
  • one or more reflective optical systems 1, 100 and/or 200 can be incorporated into a lighting device 400 generally comprising an element 401 made of a synthetic plastic material or metal and fixable in a known way to the body of a vehicle (or to the inside of the body of a headlight), for example a motor vehicle which is not illustrated for the sake of simplicity, and at least one transparent fluid-tight sealing element 402 to close an opening 404 of the cup-shaped element 401, in which the optical system 1 and/or 100 and/or 200 is arranged and housed inside the cup-shaped element 401 in a position oriented towards the opening 404 and such that the optical axis B intercepts the transparent closing element 402 and when in use is directly parallel to a direction in which the vehicle is travelling.
  • a lighting device 400 generally comprising an element 401 made of a synthetic plastic material or metal and fixable in a known way to the body of a vehicle (or to the inside of the body of a headlight), for example a motor vehicle which is not illustrated for the sake of simplicity, and
  • the printed circuit board 31 is provided, on-board, with a single LED 30 ( figure 4a ) or with a plurality of LEDs 30b,30c,30d ( figure 4b ) which are possibly selectively activatable; in any case the printed circuit board 31 is attached to a mounting surface 405 of the cup-shaped element 401, which is generally obtained on a side wall, preferably an upper wall 406 of said cup-shaped element 401 and so that the first optical axis A is arranged perpendicularly to the mounting surface 405 (clearly, in case of the system 200, an optical axis C of the LED 30 is perpendicular to the mounting surface 405).
  • the generic light source 2 (or 202) also comprises electronic control means 500, preferably mounted directly on-board the printed circuit board 31, suitable to selectively activate/deactivate the single LED 30 (in case of the source 2 - figure 4a ) or one LED 30b,30c,30d at a time (in case of a source 2' - figure 4b ) of said plurality of selectively activatable LEDs 30.
  • electronic control means 500 preferably mounted directly on-board the printed circuit board 31, suitable to selectively activate/deactivate the single LED 30 (in case of the source 2 - figure 4a ) or one LED 30b,30c,30d at a time (in case of a source 2' - figure 4b ) of said plurality of selectively activatable LEDs 30.
  • the light source 2,2',202 is produced in such a way that said first and second surfaces 3,4 of a "basic module" 1 or 200 can be operationally associated, selectively, with different LEDs, for example 30b,30c,30d; and in such a way that, in case of a lighting device 400 such as that illustrated in figure 6 , in which a single cup-shaped element 401 contains a plurality of first and second surfaces, respectively 3a,3b and 4a,4b, each operationally associated with a different LED 30a,30b, each LED 30 can be selectively activated according to a previously defined sequence.
  • the device 400 is a headlight and, in this case, the association of a pair of basic optical systems 1a,1b in a single element 401 with suitable electronic control means 500 is used to progressively illuminate different angular sectors (for example of a bend in the road) in relation to the direction in which the vehicle is travelling (SBL function).
  • the gradual activation or deactivation of the lighting element and the possibility of obtaining different brightness levels can also be achieved by using a PWM signal to modulate the current absorbed by the lighting module.
  • lighting devices of the type of the device 400 which are multifunction devices, capable of being used indifferently as headlights or lamps (for example rear lights), depending on the shape and position of the pairs of reflecting surfaces arranged at an oblique angle in relation to one another that are used each time in association with a single LED (or a plurality or battery of LEDs mounted adjacently on a single printed circuit board, as in figure 4b ).
  • the printed circuit board 31 is in all versions of the system 1, 100, 200 associated with heat dissipation means 550 ( figure 6 ), preferably mounted on the outside, for example above and to the rear, of the cup-shaped element 401.
  • the LEDs 30 are preferably mounted "face-down" or in a DLA arrangement, as schematically illustrated in figures 4a and 4b , in which the printed circuit board 31 is mounted on an upper side surface 406 of the cup-shaped element 401, with the single LED 30 or battery of LEDs 30b,30c,30d face-down and so as in any case to distribute brightness with a bright-dark cut-off line L, as illustrated in figure 3 ; in this way the optical system according to the invention is used to perform functions that require a well-defined cut-off line, such as dipped-beam headlights or fog lights, or with a dual function (dipped-beam and fog lights).
  • a well-defined cut-off line such as dipped-beam headlights or fog lights, or with a dual function (dipped-beam and fog lights).
  • Said "face-down" or DLA arrangement of the LEDs 30 also means that the optical system according to the invention can be used with the printed circuit board 31 mounted on the upper side surface 406 of the cup-shaped element 401, with the single LED 30 or battery of LEDs 30b,30c,30d face-down and associated with heat dissipation means 550 arranged on the rear of the cup-shaped element 401 and directly connected to at least one component element 560 ( figure 4 ) of the printed circuit board 31 made of a material with relatively high thermal conductivity.
  • the "face-down" or DLA arrangement of the LEDs 30 makes it possible to obtain a better thermal coupling between the printed circuit board 31 and the passive dissipation element 550, when the printed circuit board 31 is produced with an appropriate layout (single face), said thermal coupling comprising conductive tracks 562 on which the dissipation part of the LEDs 30 is mounted and which are attached to an aluminium base 565, with an intermediate heat conducting layer 566 in the form of tape or liquid adhesive, whether the passive dissipation element 550 is arranged close to ( figure 4b ) or at a distance from ( figure 4a ) the tracks 562; the dissipation element 550 can be a specific, finned element, as in figure 6 , or (alternatively or in addition) it can be said reflector 600 ( figure 6 ) consisting of a single piece (or several pieces assembled together).
  • a lighting device such as the device 400, is thus characterized by the presence of at least one reflector the whole of which is oriented towards a transparent closing element 402, which may or may not have optical functions and is possibly provided with an intermediate auxiliary optical element 20, divided along at least a meridian thereof and by means of at least one edge in at least a pair of adjacent reflecting surfaces arranged at an oblique angle in relation to one another so as to between them delimit a dihedral angle and having a structure such as to define an optical axis B of the reflector arranged essentially perpendicularly to a plane through which the optical axis (A) of the light source used each time passes.
  • control electronics can be mounted on the printed circuit board 31 on which the LEDs are mounted, in order to implement a highly compact plug&play system.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (24)

  1. Système d'éclairage optique réfléchissant (1 ; 100 ; 200) comprenant au moins une source de lumière (2) présentant un premier axe optique (A) définissant une direction principale de rayonnement de rayons de lumière émis par ladite source et au moins une première (3) et une seconde (4) surface réfléchissante associées en fonctionnement à la source de lumière (2) pour intercepter lesdits rayons de lumière et agencées de sorte à former entre elles un premier angle prédéfini (β) d'une taille autre que 180°, dans lequel les première et deuxième surfaces réfléchissantes (3, 4) délimitent entre elles une concavité (5) orientée vers la source de lumière et sont formées de sorte qu'en utilisation ladite concavité reçoive une partie importante desdits rayons de lumière émis par ladite source pour les réfléchir dans une direction formant avec le premier axe optique (A) un second angle (α) d'une taille prédéfinie, caractérisé en ce que lesdits premier et second angles sont tels que les rayons réfléchis présentent une direction principale de rayonnement définie par un second axe optique (B) sensiblement perpendiculaire au premier.
  2. Système optique selon la revendication 1, caractérisé en ce que ledit premier angle d'une taille prédéfinie (β) s'élève à 90° ou est dans la région de 90°.
  3. Système optique selon la revendication 1, caractérisé en ce que ledit premier angle d'une taille prédéfinie (β) est inférieur à 90°.
  4. Système optique selon la revendication 1, caractérisé en ce que ledit premier angle d'une taille prédéfinie (β) est supérieur à 90°.
  5. Système optique selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdites première et deuxième surfaces réfléchissantes (3, 4) sont formées de sorte à distribuer les rayons de lumière réfléchis symétriquement par rapport audit second axe optique (B).
  6. Système optique selon l'une quelconque des revendications 1 à 4, caractérisé en ce que lesdites première et deuxième surfaces réfléchissantes (3, 4) sont formées de sorte à distribuer les rayons de lumière réfléchis de manière asymétrique par rapport audit second axe optique (B).
  7. Système optique selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit second angle (α) d'une taille prédéfinie est compris de préférence entre 50 et 150° et de manière davantage préférée, entre 85 et 100°.
  8. Système optique selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend pour chaque première et deuxième surface réfléchissante (3, 4) associée à une dite source de lumière, au moins une troisième surface réfléchissante (10, 11) orientée vers ladite concavité (5) et agencée sensiblement perpendiculairement audit premier axe optique (A).
  9. Système optique selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite source de lumière (2) est une source lambertienne.
  10. Système optique selon la revendication 9, caractérisé en ce que ladite concavité (5) définie entre lesdites première et deuxième surfaces réfléchissantes (3, 4) est orientée vers ladite source de lumière (2) et occupe un solide angle supérieur à Π stéradians, c'est-à-dire supérieur à un quart de l'angle sphérique solide, et en tout cas de sorte qu'au moins 30 % des rayons de lumière émis par ladite source soient interceptés par lesdites première et deuxième surfaces réfléchissantes (3, 4).
  11. Système optique selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend aussi au moins un élément optique (20) secondaire lumineux, clair ou coloré, associé en fonctionnement auxdites première et deuxième surfaces réfléchissantes (3, 4) dans la direction définie par ledit second axe optique (B) ; ledit au moins un élément optique secondaire (20) se composant d'au moins une lentille ou d'une matrice de micro-optique.
  12. Système optique (100) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend une pluralité de sources de lumière (2a, b, c), chacune associée en fonctionnement à l'une desdites première (3a, b, c) et deuxième (4a, b, c) surfaces réfléchissantes de sorte à former avec elles un seul module d'éclairage (1a, b, c) de sorte que ledit système optique soit fabriqué d'une pluralité desdits modules d'éclairage (2a, b, c) juxtaposés mutuellement dans un agencement de matrice à une dimension (X, Y) ou deux dimensions (XY).
  13. Système optique selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite source de lumière (2) comprend des moyens photoémissifs choisis dans le groupe suivant : lampes incandescentes ; lampes à décharge de gaz, DEL monochromes ; DEL polychromes.
  14. Système optique selon la revendication 13, caractérisé en ce que ladite source de lumière (2) comprend au moins une DEL (30) adaptée pour émettre un flux lumineux d'au moins 10 lumens pour une DEL à lumière blanche et 3 lumens pour une DEL à lumière rouge ou orange.
  15. Système optique (200) selon la revendication 13 ou 14, caractérisé en ce que ladite source de lumière comprend aussi un guide de lumière (203), dont une première extrémité (204) est agencée sur l'axe avec ledit premier axe optique et dont une seconde extrémité (205) est agencée à distance par rapport à la première et est reliée auxdits moyens photoémissifs.
  16. Dispositif d'éclairage (400) comprenant un élément en forme de coupe (401), de préférence en un matériau plastique synthétique et fixable au corps d'un véhicule ou à l'intérieur du corps d'un phare aussi constitué de matériau synthétique, au moins un élément d'étanchéité étanche au fluide et transparent (402) pour fermer une ouverture (404) de l'élément en forme de coupe et un système d'éclairage optique réfléchissant (1 ; 100 ; 200) comprenant au moins une source de lumière (2) présentant un premier axe optique (A) définissant une direction principale de rayonnement de rayons de lumière émis par ladite source et au moins une première (3) et une seconde (4) surface réfléchissante associées en fonctionnement à la source de lumière (2) pour intercepter lesdits rayons de lumière et agencées de sorte à former entre elles un premier angle prédéfini (β) d'une taille autre que 180°, dans lequel les première et deuxième surfaces réfléchissantes (3, 4) délimitent entre elles une concavité (5) orientée vers la source de lumière et sont formées de sorte qu'en utilisation, ladite concavité reçoive une partie importante desdits rayons de lumière émis par ladite source pour les réfléchir dans une direction formant avec le premier axe optique (A) un second angle (α) d'une taille prédéfinie, et dans lequel ledit premier et second angle sont tels que les rayons réfléchis présentent une direction principale de rayonnement définie par un second axe optique (B) sensiblement perpendiculaire au premier ; caractérisé en ce que le système optique (1 ; 100 ; 200) est agencé et logé dans l'élément en forme de coupe (401) dans une position orientée vers l'ouverture (404) et de sorte que le second axe optique (B) intercepte ledit élément de fermeture transparent (402) et en utilisation soit directement parallèle à une direction dans laquelle le véhicule se déplace ; ladite au moins une source de lumière comprenant une carte de circuit imprimé (31) prévue à l'intérieur avec une seule DEL (30) ou une pluralité de DEL activables sélectivement (30a, b, c) ; la carte de circuit imprimé (31) étant attachée à une surface de montage (405) de l'élément en forme de coupe ; ladite surface de montage (405) étant obtenue sur une paroi latérale (406), de préférence une paroi supérieure dudit élément en forme de coupe et de telle manière que ledit premier axe optique (A) soit agencé perpendiculairement à ladite surface de montage (405) .
  17. Dispositif d'éclairage selon la revendication 16, caractérisé en ce que ladite au moins une source de lumière (2) comprend aussi des moyens de commande électroniques (500), montés de préférence directement à l'intérieur de ladite carte de circuit imprimé (31).
  18. Dispositif d'éclairage selon la revendication 17, caractérisé en ce que lesdits moyens de contrôle électroniques (500) sont adaptés pour activer/désactiver sélectivement ladite seule DEL (30) ou une DEL (30a, b, c) à la fois de ladite pluralité de DEL activables sélectivement, de sorte que lesdites première et deuxième surfaces (3a, 3b ; 4a, 4b) puissent être associées en fonctionnement, sélectivement à différentes DEL (30a, b) ; et de telle manière qu'en cas de présence dans un seul élément (401) d'une pluralité de premières et deuxièmes surfaces (3, 4), chacune étant associée en fonctionnement à une DEL différente, chaque DEL (30) puisse être activée sélectivement selon une séquence prédéfinie par exemple pour éclairer progressivement différents secteurs angulaires par rapport à la direction dans laquelle le véhicule se déplace.
  19. Dispositif d'éclairage selon la revendication 17 ou 18, caractérisé en ce que ladite carte de circuit imprimé (31) est associée à des moyens de dissipation de chaleur (550) prévus sur ledit élément en forme de coupe.
  20. Utilisation d'un dispositif d'éclairage (400) selon la revendication 18 comme phare de véhicule (ou parties de celui-ci).
  21. Utilisation d'un dispositif d'éclairage (400) selon la revendication 18 comme lampe, en particulier feu arrière d'un véhicule.
  22. Utilisation selon la revendication 19, dans laquelle ladite carte de circuit imprimé (31) est montée sur une surface latérale supérieure (406) de l'élément en forme de coupe, avec ladite seule DEL (30) ou pluralité de DEL (30a, b, c) dirigée vers le bas et de sorte à distribuer de la luminosité avec une ligne de coupure claire-sombre.
  23. Utilisation selon la revendication 19 ou 20, dans laquelle ladite carte de circuit imprimé (31) est montée sur une surface latérale supérieure (406) de l'élément en forme de coupe, avec ladite seule DEL (30) ou pluralité de DEL (30a, b, c) dirigée vers le bas, et est associée à des moyens de dissipation de chaleur (550) agencés sur l'arrière de l'élément en forme de coupe et directement reliés à un élément de composant (560) de ladite carte de circuit imprimé constituée d'un matériau avec une conductivité thermique relativement élevée.
  24. Utilisation selon la revendication 22, caractérisée en ce que ladite carte de circuit imprimé (31) est un circuit à une seule face et est thermiquement couplée à un élément de dissipation passive (550) entre un côté soudé de la carte de circuit imprimé (30) et l'élément de dissipation passive (550) à l'aide d'une interface thermique (566) sous la forme d'un ruban adhésif ou d'un adhésif liquide.
EP07425625.6A 2007-10-05 2007-10-05 Système d'éclairage optique réflectif modulaire et dispositif d'éclairage équipé de celui-ci, en particulier pour véhicules Active EP2045514B2 (fr)

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DE102011006073A1 (de) 2011-03-24 2012-09-27 Automotive Lighting Reutlingen Gmbh Kraftfahrzeugbeleuchtungseinrichtung und Kraftfahrzeugscheinwerfer mit einer solchen Beleuchtungseinrichtung
CN105473934B (zh) * 2013-08-08 2018-03-30 皇家飞利浦有限公司 用于机动车辆的通用日间行车灯
DE102013220192B4 (de) * 2013-10-07 2015-04-30 Automotive Lighting Reutlingen Gmbh LED-Modul eines Kraftfahrzeugscheinwerfers
EP3169547B1 (fr) * 2014-07-15 2022-01-26 Lumileds LLC Module d'éclairage de véhicule
DE102014218540B4 (de) * 2014-09-16 2023-04-20 Volkswagen Aktiengesellschaft Fahrzeugleuchte und Verfahren zum Bereitstellen einer Lichtfunktion mittels einer Fahrzeugleuchte
FR3032516B1 (fr) 2015-02-06 2021-04-16 Valeo Vision Dispositif reflecteur d'un module lumineux avec blindage electromagnetique
IT201600124320A1 (it) * 2016-12-09 2018-06-09 Olsa Spa Sistema ottico a funzionalità multipa
DE112019007083T5 (de) 2019-03-27 2021-12-30 Hella Autotechnik Nova, S.R.O. Beleuchtungsvorrichtung für Fahrzeuge

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EP1388707A2 (fr) 2002-08-10 2004-02-11 Hella KG Hueck & Co. Unité d'éclairage pour véhicules automobiles
US20050088758A1 (en) * 2003-02-04 2005-04-28 Light Prescriptions Innovators, Llc, A Delaware Limited Liability Company Etendue-squeezing illumination optics
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EP1912018A1 (fr) 2006-09-07 2008-04-16 Hella KG Hueck & Co. Phares de projection pour véhicules

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